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Comparing libev/ev.c (file contents):
Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs.
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC

1/*
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials provided
15 * with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
1#include <math.h> 30#include <math.h>
2#include <stdlib.h> 31#include <stdlib.h>
3#include <unistd.h> 32#include <unistd.h>
4#include <fcntl.h> 33#include <fcntl.h>
5#include <signal.h> 34#include <signal.h>
35#include <stddef.h>
6 36
7#include <stdio.h> 37#include <stdio.h>
8 38
9#include <assert.h> 39#include <assert.h>
10#include <errno.h> 40#include <errno.h>
41#include <sys/types.h>
42#include <sys/wait.h>
11#include <sys/time.h> 43#include <sys/time.h>
12#include <time.h> 44#include <time.h>
13
14#define HAVE_EPOLL 1
15 45
16#ifndef HAVE_MONOTONIC 46#ifndef HAVE_MONOTONIC
17# ifdef CLOCK_MONOTONIC 47# ifdef CLOCK_MONOTONIC
18# define HAVE_MONOTONIC 1 48# define HAVE_MONOTONIC 1
19# endif 49# endif
… …
31# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */
32#endif 62#endif
33 63
34#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35#define MAX_BLOCKTIME 60. 65#define MAX_BLOCKTIME 60.
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
36 67
37#include "ev.h" 68#include "ev.h"
38 69
39typedef struct ev_watcher *W; 70typedef struct ev_watcher *W;
40typedef struct ev_watcher_list *WL; 71typedef struct ev_watcher_list *WL;
… …
82} 113}
83 114
84#define array_needsize(base,cur,cnt,init) \ 115#define array_needsize(base,cur,cnt,init) \
85 if ((cnt) > cur) \ 116 if ((cnt) > cur) \
86 { \ 117 { \
87 int newcnt = cur ? cur << 1 : 16; \ 118 int newcnt = cur; \
88 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 119 do \
120 { \
121 newcnt = (newcnt << 1) | 4 & ~3; \
122 } \
123 while ((cnt) > newcnt); \
124 \
89 base = realloc (base, sizeof (*base) * (newcnt)); \ 125 base = realloc (base, sizeof (*base) * (newcnt)); \
90 init (base + cur, newcnt - cur); \ 126 init (base + cur, newcnt - cur); \
91 cur = newcnt; \ 127 cur = newcnt; \
92 } 128 }
93 129
94/*****************************************************************************/ 130/*****************************************************************************/
95 131
96typedef struct 132typedef struct
97{ 133{
98 struct ev_io *head; 134 struct ev_io *head;
99 unsigned char wev, rev; /* want, received event set */ 135 int events;
100} ANFD; 136} ANFD;
101 137
102static ANFD *anfds; 138static ANFD *anfds;
103static int anfdmax; 139static int anfdmax;
104 140
105static int *fdchanges;
106static int fdchangemax, fdchangecnt;
107
108static void 141static void
109anfds_init (ANFD *base, int count) 142anfds_init (ANFD *base, int count)
110{ 143{
111 while (count--) 144 while (count--)
112 { 145 {
113 base->head = 0; 146 base->head = 0;
114 base->wev = base->rev = EV_NONE; 147 base->events = EV_NONE;
115 ++base; 148 ++base;
116 } 149 }
117} 150}
118 151
119typedef struct 152typedef struct
… …
126static int pendingmax, pendingcnt; 159static int pendingmax, pendingcnt;
127 160
128static void 161static void
129event (W w, int events) 162event (W w, int events)
130{ 163{
164 if (w->active)
165 {
131 w->pending = ++pendingcnt; 166 w->pending = ++pendingcnt;
132 array_needsize (pendings, pendingmax, pendingcnt, ); 167 array_needsize (pendings, pendingmax, pendingcnt, );
133 pendings [pendingcnt - 1].w = w; 168 pendings [pendingcnt - 1].w = w;
134 pendings [pendingcnt - 1].events = events; 169 pendings [pendingcnt - 1].events = events;
170 }
171}
172
173static void
174queue_events (W *events, int eventcnt, int type)
175{
176 int i;
177
178 for (i = 0; i < eventcnt; ++i)
179 event (events [i], type);
135} 180}
136 181
137static void 182static void
138fd_event (int fd, int events) 183fd_event (int fd, int events)
139{ 184{
… …
147 if (ev) 192 if (ev)
148 event ((W)w, ev); 193 event ((W)w, ev);
149 } 194 }
150} 195}
151 196
197/*****************************************************************************/
198
199static int *fdchanges;
200static int fdchangemax, fdchangecnt;
201
152static void 202static void
153queue_events (W *events, int eventcnt, int type) 203fd_reify (void)
154{ 204{
155 int i; 205 int i;
156 206
157 for (i = 0; i < eventcnt; ++i) 207 for (i = 0; i < fdchangecnt; ++i)
158 event (events [i], type); 208 {
209 int fd = fdchanges [i];
210 ANFD *anfd = anfds + fd;
211 struct ev_io *w;
212
213 int events = 0;
214
215 for (w = anfd->head; w; w = w->next)
216 events |= w->events;
217
218 anfd->events &= ~EV_REIFY;
219
220 if (anfd->events != events)
221 {
222 method_modify (fd, anfd->events, events);
223 anfd->events = events;
224 }
225 }
226
227 fdchangecnt = 0;
228}
229
230static void
231fd_change (int fd)
232{
233 if (anfds [fd].events & EV_REIFY)
234 return;
235
236 anfds [fd].events |= EV_REIFY;
237
238 ++fdchangecnt;
239 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
240 fdchanges [fdchangecnt - 1] = fd;
241}
242
243/* called on EBADF to verify fds */
244static void
245fd_recheck (void)
246{
247 int fd;
248
249 for (fd = 0; fd < anfdmax; ++fd)
250 if (anfds [fd].events)
251 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
252 while (anfds [fd].head)
253 {
254 event ((W)anfds [fd].head, EV_ERROR);
255 evio_stop (anfds [fd].head);
256 }
159} 257}
160 258
161/*****************************************************************************/ 259/*****************************************************************************/
162 260
163static struct ev_timer **timers; 261static struct ev_timer **timers;
… …
281/*****************************************************************************/ 379/*****************************************************************************/
282 380
283static struct ev_idle **idles; 381static struct ev_idle **idles;
284static int idlemax, idlecnt; 382static int idlemax, idlecnt;
285 383
384static struct ev_prepare **prepares;
385static int preparemax, preparecnt;
386
286static struct ev_check **checks; 387static struct ev_check **checks;
287static int checkmax, checkcnt; 388static int checkmax, checkcnt;
288 389
289/*****************************************************************************/ 390/*****************************************************************************/
290 391
392static struct ev_child *childs [PID_HASHSIZE];
393static struct ev_signal childev;
394
395#ifndef WCONTINUED
396# define WCONTINUED 0
397#endif
398
399static void
400childcb (struct ev_signal *sw, int revents)
401{
402 struct ev_child *w;
403 int pid, status;
404
405 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)
406 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
407 if (w->pid == pid || w->pid == -1)
408 {
409 w->status = status;
410 event ((W)w, EV_CHILD);
411 }
412}
413
414/*****************************************************************************/
415
291#if HAVE_EPOLL 416#if HAVE_EPOLL
292# include "ev_epoll.c" 417# include "ev_epoll.c"
293#endif 418#endif
294#if HAVE_SELECT 419#if HAVE_SELECT
295# include "ev_select.c" 420# include "ev_select.c"
296#endif 421#endif
297 422
423int
424ev_version_major (void)
425{
426 return EV_VERSION_MAJOR;
427}
428
429int
430ev_version_minor (void)
431{
432 return EV_VERSION_MINOR;
433}
434
298int ev_init (int flags) 435int ev_init (int flags)
299{ 436{
437 if (!ev_method)
438 {
300#if HAVE_MONOTONIC 439#if HAVE_MONOTONIC
301 { 440 {
302 struct timespec ts; 441 struct timespec ts;
303 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 442 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304 have_monotonic = 1; 443 have_monotonic = 1;
305 } 444 }
306#endif 445#endif
307 446
308 ev_now = ev_time (); 447 ev_now = ev_time ();
309 now = get_clock (); 448 now = get_clock ();
310 diff = ev_now - now; 449 diff = ev_now - now;
311 450
312 if (pipe (sigpipe)) 451 if (pipe (sigpipe))
313 return 0; 452 return 0;
314 453
315 ev_method = EVMETHOD_NONE; 454 ev_method = EVMETHOD_NONE;
316#if HAVE_EPOLL 455#if HAVE_EPOLL
317 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 456 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318#endif 457#endif
319#if HAVE_SELECT 458#if HAVE_SELECT
320 if (ev_method == EVMETHOD_NONE) select_init (flags); 459 if (ev_method == EVMETHOD_NONE) select_init (flags);
321#endif 460#endif
322 461
323 if (ev_method) 462 if (ev_method)
324 { 463 {
325 evw_init (&sigev, sigcb); 464 evw_init (&sigev, sigcb);
326 siginit (); 465 siginit ();
466
467 evsignal_init (&childev, childcb, SIGCHLD);
468 evsignal_start (&childev);
469 }
327 } 470 }
328 471
329 return ev_method; 472 return ev_method;
330} 473}
331 474
332/*****************************************************************************/ 475/*****************************************************************************/
333 476
477void
334void ev_prefork (void) 478ev_prefork (void)
335{ 479{
336 /* nop */ 480 /* nop */
337} 481}
338 482
483void
339void ev_postfork_parent (void) 484ev_postfork_parent (void)
340{ 485{
341 /* nop */ 486 /* nop */
342} 487}
343 488
489void
344void ev_postfork_child (void) 490ev_postfork_child (void)
345{ 491{
346#if HAVE_EPOLL 492#if HAVE_EPOLL
347 if (ev_method == EVMETHOD_EPOLL) 493 if (ev_method == EVMETHOD_EPOLL)
348 epoll_postfork_child (); 494 epoll_postfork_child ();
349#endif 495#endif
… …
356} 502}
357 503
358/*****************************************************************************/ 504/*****************************************************************************/
359 505
360static void 506static void
361fd_reify (void)
362{
363 int i;
364
365 for (i = 0; i < fdchangecnt; ++i)
366 {
367 int fd = fdchanges [i];
368 ANFD *anfd = anfds + fd;
369 struct ev_io *w;
370
371 int wev = 0;
372
373 for (w = anfd->head; w; w = w->next)
374 wev |= w->events;
375
376 if (anfd->wev != wev)
377 {
378 method_modify (fd, anfd->wev, wev);
379 anfd->wev = wev;
380 }
381 }
382
383 fdchangecnt = 0;
384}
385
386static void
387call_pending () 507call_pending (void)
388{ 508{
389 int i; 509 while (pendingcnt)
390
391 for (i = 0; i < pendingcnt; ++i)
392 { 510 {
393 ANPENDING *p = pendings + i; 511 ANPENDING *p = pendings + --pendingcnt;
394 512
395 if (p->w) 513 if (p->w)
396 { 514 {
397 p->w->pending = 0; 515 p->w->pending = 0;
398 p->w->cb (p->w, p->events); 516 p->w->cb (p->w, p->events);
399 } 517 }
400 } 518 }
401
402 pendingcnt = 0;
403} 519}
404 520
405static void 521static void
406timers_reify () 522timers_reify (void)
407{ 523{
408 while (timercnt && timers [0]->at <= now) 524 while (timercnt && timers [0]->at <= now)
409 { 525 {
410 struct ev_timer *w = timers [0]; 526 struct ev_timer *w = timers [0];
527
528 event ((W)w, EV_TIMEOUT);
411 529
412 /* first reschedule or stop timer */ 530 /* first reschedule or stop timer */
413 if (w->repeat) 531 if (w->repeat)
414 { 532 {
415 w->at = now + w->repeat; 533 w->at = now + w->repeat;
416 assert (("timer timeout in the past, negative repeat?", w->at > now)); 534 assert (("timer timeout in the past, negative repeat?", w->at > now));
417 downheap ((WT *)timers, timercnt, 0); 535 downheap ((WT *)timers, timercnt, 0);
418 } 536 }
419 else 537 else
420 evtimer_stop (w); /* nonrepeating: stop timer */ 538 evtimer_stop (w); /* nonrepeating: stop timer */
421
422 event ((W)w, EV_TIMEOUT);
423 } 539 }
424} 540}
425 541
426static void 542static void
427periodics_reify () 543periodics_reify (void)
428{ 544{
429 while (periodiccnt && periodics [0]->at <= ev_now) 545 while (periodiccnt && periodics [0]->at <= ev_now)
430 { 546 {
431 struct ev_periodic *w = periodics [0]; 547 struct ev_periodic *w = periodics [0];
432 548
… …
468 } 584 }
469 } 585 }
470} 586}
471 587
472static void 588static void
473time_update () 589time_update (void)
474{ 590{
475 int i; 591 int i;
476 592
477 ev_now = ev_time (); 593 ev_now = ev_time ();
478 594
… …
512int ev_loop_done; 628int ev_loop_done;
513 629
514void ev_loop (int flags) 630void ev_loop (int flags)
515{ 631{
516 double block; 632 double block;
517 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; 633 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
518
519 if (checkcnt)
520 {
521 queue_events ((W *)checks, checkcnt, EV_CHECK);
522 call_pending ();
523 }
524 634
525 do 635 do
526 { 636 {
637 /* queue check watchers (and execute them) */
638 if (preparecnt)
639 {
640 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
641 call_pending ();
642 }
643
527 /* update fd-related kernel structures */ 644 /* update fd-related kernel structures */
528 fd_reify (); 645 fd_reify ();
529 646
530 /* calculate blocking time */ 647 /* calculate blocking time */
531 648
532 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 649 /* we only need this for !monotonic clockor timers, but as we basically
650 always have timers, we just calculate it always */
533 ev_now = ev_time (); 651 ev_now = ev_time ();
534 652
535 if (flags & EVLOOP_NONBLOCK || idlecnt) 653 if (flags & EVLOOP_NONBLOCK || idlecnt)
536 block = 0.; 654 block = 0.;
537 else 655 else
538 { 656 {
539 block = MAX_BLOCKTIME; 657 block = MAX_BLOCKTIME;
540 658
541 if (timercnt) 659 if (timercnt)
542 { 660 {
543 ev_tstamp to = timers [0]->at - get_clock () + method_fudge; 661 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
544 if (block > to) block = to; 662 if (block > to) block = to;
545 } 663 }
546 664
547 if (periodiccnt) 665 if (periodiccnt)
548 { 666 {
… …
557 675
558 /* update ev_now, do magic */ 676 /* update ev_now, do magic */
559 time_update (); 677 time_update ();
560 678
561 /* queue pending timers and reschedule them */ 679 /* queue pending timers and reschedule them */
680 timers_reify (); /* relative timers called last */
562 periodics_reify (); /* absolute timers first */ 681 periodics_reify (); /* absolute timers called first */
563 timers_reify (); /* relative timers second */
564 682
565 /* queue idle watchers unless io or timers are pending */ 683 /* queue idle watchers unless io or timers are pending */
566 if (!pendingcnt) 684 if (!pendingcnt)
567 queue_events ((W *)idles, idlecnt, EV_IDLE); 685 queue_events ((W *)idles, idlecnt, EV_IDLE);
568 686
569 /* queue check and possibly idle watchers */ 687 /* queue check watchers, to be executed first */
688 if (checkcnt)
570 queue_events ((W *)checks, checkcnt, EV_CHECK); 689 queue_events ((W *)checks, checkcnt, EV_CHECK);
571 690
572 call_pending (); 691 call_pending ();
573 } 692 }
574 while (!ev_loop_done); 693 while (!ev_loop_done);
575 694
… …
600 head = &(*head)->next; 719 head = &(*head)->next;
601 } 720 }
602} 721}
603 722
604static void 723static void
724ev_clear (W w)
725{
726 if (w->pending)
727 {
728 pendings [w->pending - 1].w = 0;
729 w->pending = 0;
730 }
731}
732
733static void
605ev_start (W w, int active) 734ev_start (W w, int active)
606{ 735{
607 w->pending = 0;
608 w->active = active; 736 w->active = active;
609} 737}
610 738
611static void 739static void
612ev_stop (W w) 740ev_stop (W w)
613{ 741{
614 if (w->pending)
615 pendings [w->pending - 1].w = 0;
616
617 w->active = 0; 742 w->active = 0;
618} 743}
619 744
620/*****************************************************************************/ 745/*****************************************************************************/
621 746
… …
629 754
630 ev_start ((W)w, 1); 755 ev_start ((W)w, 1);
631 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 756 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
632 wlist_add ((WL *)&anfds[fd].head, (WL)w); 757 wlist_add ((WL *)&anfds[fd].head, (WL)w);
633 758
634 ++fdchangecnt; 759 fd_change (fd);
635 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636 fdchanges [fdchangecnt - 1] = fd;
637} 760}
638 761
639void 762void
640evio_stop (struct ev_io *w) 763evio_stop (struct ev_io *w)
641{ 764{
765 ev_clear ((W)w);
642 if (!ev_is_active (w)) 766 if (!ev_is_active (w))
643 return; 767 return;
644 768
645 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 769 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646 ev_stop ((W)w); 770 ev_stop ((W)w);
647 771
648 ++fdchangecnt; 772 fd_change (w->fd);
649 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650 fdchanges [fdchangecnt - 1] = w->fd;
651} 773}
652
653 774
654void 775void
655evtimer_start (struct ev_timer *w) 776evtimer_start (struct ev_timer *w)
656{ 777{
657 if (ev_is_active (w)) 778 if (ev_is_active (w))
… …
668} 789}
669 790
670void 791void
671evtimer_stop (struct ev_timer *w) 792evtimer_stop (struct ev_timer *w)
672{ 793{
794 ev_clear ((W)w);
673 if (!ev_is_active (w)) 795 if (!ev_is_active (w))
674 return; 796 return;
675 797
676 if (w->active < timercnt--) 798 if (w->active < timercnt--)
677 { 799 {
678 timers [w->active - 1] = timers [timercnt]; 800 timers [w->active - 1] = timers [timercnt];
679 downheap ((WT *)timers, timercnt, w->active - 1); 801 downheap ((WT *)timers, timercnt, w->active - 1);
680 } 802 }
681 803
804 w->at = w->repeat;
805
682 ev_stop ((W)w); 806 ev_stop ((W)w);
807}
808
809void
810evtimer_again (struct ev_timer *w)
811{
812 if (ev_is_active (w))
813 {
814 if (w->repeat)
815 {
816 w->at = now + w->repeat;
817 downheap ((WT *)timers, timercnt, w->active - 1);
818 }
819 else
820 evtimer_stop (w);
821 }
822 else if (w->repeat)
823 evtimer_start (w);
683} 824}
684 825
685void 826void
686evperiodic_start (struct ev_periodic *w) 827evperiodic_start (struct ev_periodic *w)
687{ 828{
… …
701} 842}
702 843
703void 844void
704evperiodic_stop (struct ev_periodic *w) 845evperiodic_stop (struct ev_periodic *w)
705{ 846{
847 ev_clear ((W)w);
706 if (!ev_is_active (w)) 848 if (!ev_is_active (w))
707 return; 849 return;
708 850
709 if (w->active < periodiccnt--) 851 if (w->active < periodiccnt--)
710 { 852 {
… …
736} 878}
737 879
738void 880void
739evsignal_stop (struct ev_signal *w) 881evsignal_stop (struct ev_signal *w)
740{ 882{
883 ev_clear ((W)w);
741 if (!ev_is_active (w)) 884 if (!ev_is_active (w))
742 return; 885 return;
743 886
744 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 887 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
745 ev_stop ((W)w); 888 ev_stop ((W)w);
… …
758 idles [idlecnt - 1] = w; 901 idles [idlecnt - 1] = w;
759} 902}
760 903
761void evidle_stop (struct ev_idle *w) 904void evidle_stop (struct ev_idle *w)
762{ 905{
906 ev_clear ((W)w);
907 if (ev_is_active (w))
908 return;
909
763 idles [w->active - 1] = idles [--idlecnt]; 910 idles [w->active - 1] = idles [--idlecnt];
911 ev_stop ((W)w);
912}
913
914void evprepare_start (struct ev_prepare *w)
915{
916 if (ev_is_active (w))
917 return;
918
919 ev_start ((W)w, ++preparecnt);
920 array_needsize (prepares, preparemax, preparecnt, );
921 prepares [preparecnt - 1] = w;
922}
923
924void evprepare_stop (struct ev_prepare *w)
925{
926 ev_clear ((W)w);
927 if (ev_is_active (w))
928 return;
929
930 prepares [w->active - 1] = prepares [--preparecnt];
764 ev_stop ((W)w); 931 ev_stop ((W)w);
765} 932}
766 933
767void evcheck_start (struct ev_check *w) 934void evcheck_start (struct ev_check *w)
768{ 935{
… …
774 checks [checkcnt - 1] = w; 941 checks [checkcnt - 1] = w;
775} 942}
776 943
777void evcheck_stop (struct ev_check *w) 944void evcheck_stop (struct ev_check *w)
778{ 945{
946 ev_clear ((W)w);
947 if (ev_is_active (w))
948 return;
949
779 checks [w->active - 1] = checks [--checkcnt]; 950 checks [w->active - 1] = checks [--checkcnt];
780 ev_stop ((W)w); 951 ev_stop ((W)w);
952}
953
954void evchild_start (struct ev_child *w)
955{
956 if (ev_is_active (w))
957 return;
958
959 ev_start ((W)w, 1);
960 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
961}
962
963void evchild_stop (struct ev_child *w)
964{
965 ev_clear ((W)w);
966 if (ev_is_active (w))
967 return;
968
969 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970 ev_stop ((W)w);
971}
972
973/*****************************************************************************/
974
975struct ev_once
976{
977 struct ev_io io;
978 struct ev_timer to;
979 void (*cb)(int revents, void *arg);
980 void *arg;
981};
982
983static void
984once_cb (struct ev_once *once, int revents)
985{
986 void (*cb)(int revents, void *arg) = once->cb;
987 void *arg = once->arg;
988
989 evio_stop (&once->io);
990 evtimer_stop (&once->to);
991 free (once);
992
993 cb (revents, arg);
994}
995
996static void
997once_cb_io (struct ev_io *w, int revents)
998{
999 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1000}
1001
1002static void
1003once_cb_to (struct ev_timer *w, int revents)
1004{
1005 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1006}
1007
1008void
1009ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1010{
1011 struct ev_once *once = malloc (sizeof (struct ev_once));
1012
1013 if (!once)
1014 cb (EV_ERROR, arg);
1015 else
1016 {
1017 once->cb = cb;
1018 once->arg = arg;
1019
1020 evw_init (&once->io, once_cb_io);
1021
1022 if (fd >= 0)
1023 {
1024 evio_set (&once->io, fd, events);
1025 evio_start (&once->io);
1026 }
1027
1028 evw_init (&once->to, once_cb_to);
1029
1030 if (timeout >= 0.)
1031 {
1032 evtimer_set (&once->to, timeout, 0.);
1033 evtimer_start (&once->to);
1034 }
1035 }
781} 1036}
782 1037
783/*****************************************************************************/ 1038/*****************************************************************************/
784 1039
785#if 0 1040#if 0

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